CVE-2022-39307 in Grafana
Summary
by MITRE • 11/10/2022
Grafana is an open-source platform for monitoring and observability. When using the forget password on the login page, a POST request is made to the `/api/user/password/sent-reset-email` URL. When the username or email does not exist, a JSON response contains a “user not found” message. This leaks information to unauthenticated users and introduces a security risk. This issue has been patched in 9.2.4 and backported to 8.5.15. There are no known workarounds.
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Analysis
by VulDB Data Team • 06/08/2025
This vulnerability resides within the Grafana monitoring platform's password reset functionality, specifically exposing information leakage during authentication attempts. The flaw occurs when users attempt to reset their passwords through the login interface, where the system processes a POST request to the /api/user/password/sent-reset-email endpoint. When the provided username or email address does not correspond to an existing account, the system returns a JSON response containing a "user not found" message that is accessible to any unauthenticated user. This behavior represents a classic information disclosure vulnerability that violates fundamental security principles by providing attackers with account enumeration data without proper authentication requirements.
The technical implementation of this vulnerability stems from inadequate input validation and response handling within the authentication flow. The system's design fails to implement consistent error responses regardless of whether a user account exists, creating a side-channel information leak that can be exploited for account enumeration attacks. This type of vulnerability aligns with CWE-200, which specifically addresses "Information Exposure" and falls under the broader category of insecure authentication mechanisms. The flaw enables attackers to determine the validity of usernames or email addresses through simple trial-and-error approaches, which can serve as a precursor to more sophisticated attacks such as credential stuffing or brute force attempts.
The operational impact of this vulnerability extends beyond simple information disclosure, as it creates a foundation for account compromise through enumeration-based attacks. An attacker can systematically test various username and email combinations to identify valid accounts within the system, potentially leading to unauthorized access through subsequent exploitation attempts. This vulnerability particularly affects organizations relying on Grafana for monitoring and observability, as it undermines the security of their authentication infrastructure and could expose sensitive monitoring data to unauthorized parties. The risk is compounded by the fact that no workarounds exist, meaning organizations must either upgrade to patched versions or accept the security risk.
Organizations should immediately implement the available patches for Grafana version 9.2.4 and 8.5.15 to remediate this vulnerability, as no effective workarounds are available. The fix addresses the core issue by ensuring consistent error responses that do not reveal account existence information to unauthenticated users. Security teams should also implement additional monitoring to detect potential enumeration attempts and consider implementing rate limiting on authentication endpoints to further mitigate the risk. This vulnerability demonstrates the importance of proper error handling in authentication systems and aligns with ATT&CK technique T1586, which covers credential access through enumeration and brute force attacks. Organizations should conduct comprehensive security assessments of their Grafana installations to ensure proper patching and validate that no other similar information disclosure vulnerabilities exist within their monitoring infrastructure.